Anuário 2002 / Ministério da Economia
2003/04 Anuário do / Ministério da Economia
Barriers to competition in the supply of electronic communications networks and services : a final report to the European Commission / David Lewin, David Rogerson
Regulating the telecoms market [documento electrónico] : competition and innovation in the broadband economy / Tim Hills, David Cleevely with Ross Pow; ed. Catherine Dyer